Exit sign



FIG. 1 is a perspective view of an exit sign;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing of a word in FIG. 1 and FIG. 2 is included for the purpose of showing environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for an exit sign, as shown and described. 